Mike Meyers Ch2 Keyterms

Question 1

Application layer

Answer 1

OSI Layer 7, it doesn’t refer to the applications themselves it refers to the code built into all operating systems that enables network aware applications.

Question 2

Application programming interfaces (API)

Answer 2

Used by programmers to make their program network aware

Question 3

Broadcast/Broadcast address

Answer 3

Broadcast is used to discover a MAC address that it doesn’t currently know.

Broadcast address is FF-FF-FF-FF-FF-FF

Question 4

Cyclic redundancy check (CRC)

Answer 4

A type of binary math that the receiving NIC uses to verify that the data arrived intact

Question 5

Data Link Layer

Answer 5

Layer 2 of the OSI model.

Question 6

Datagrams

Answer 6

Also know as segments depending on the specific transport protocol used

Question 7

Deencapsularion

Answer 7

The reverse process of stripping all the extra header information out as the data goes up the stack

Question 8

Device ID

Answer 8

The last 6 digits of the manufacturers unique serial number for a NIC

Question 9

Encapsulation

Answer 9

This is the entire process of preparing data to go onto the network and includes all the steps from application, presentation, session, transport, network and data link layers. Each of the 6 layers adds more information so that the data get to the correct recipient and the recipient knows what to do with the data

Question 10

EUI-48

Answer 10

Stands for extended unique identifier

Question 11

Frame

Answer 11

A container for a chuck of data moving across a network

Question 12

Internet Layer

Answer 12

Should really be called the “IP Packet” layer. Any device or protocol that deals with pure IP packets - getting an IP packet to its destination

Question 13

Internet Protocol

Answer 13

Part of the TCP/IP protocol

Question 14

IP Address

Answer 14

A unique numeric identifier also know as a logical address to distinguish it from the physical address, the MAC address of the NIC

Question 15

Logical addressing

Answer 15

A method large networks need that ignores hardware and enables you to break up the entire large network into smaller networks called subnets. It’s like a postal code or telephone number in scheme

Question 16

MAC-48

Answer 16

The IEEE forms MAC addresses from a numbering name space which was originally LLC called MAC-48… which means that the MAC address will be 48 bits

Question 17

MAC address

Answer 17

Media access control address. A special firmware containing a unique identifier with a 48bit value

Question 18

NIC network interface card

Answer 18

Serves as the interface between pc and the network.

Question 19

Network Interface Layer

Answer 19

Part of the TCP/IP model that lumps the OSI’s layer 1 & 2 into a single layer called the link layer or network interface layer

Question 20

Network Protocol

Answer 20

A special software that uses logical addressing to move past the physical MAC addresses

Question 21

OSI or Open interconnection seven layer model

Answer 21

One of the methods used to conceptualize the many parts of the network

Question 22

OUI -Organizationally Unique Identifier

Answer 22

6 hex digits assigned by the IEEE to a manufacturer and no other manufacturer may use

Question 23

Packets

Answer 23

At the network layer, layer 3, containers called packets are created and addresses so they can go from one network to another.

Question 24

Payload

Answer 24

The data, or payload, starts and ends in the application. Layer 7 of OSI model and Layer 4 of the TCP/IP model

Question 25

Physical address

Answer 25

A term the ipconfig calls the MAC address

Question 26

Physical layer

Answer 26

Layer 1 of the OSI model - anything that moves data from one system to another, such as copper cabling, fiber optics, even radio waves, is part of the physical layer.

Question 27

Presentation layer

Answer 27

Layer 6 of the OSI model that translates data from lower layers into a format usable by the application layer and vice versa.

Question 28

Protocol

Answer 28

Are sets of early defined rules, regulations, standards, and procedures that enable hardware and software developers to make devices and applications properly at a particular level. E

Question 29

Router

Answer 29

Makes logical addressing powerful, by connecting subnets.

Question 30

Segment

Answer 30

A chunk of data created in the transport protocol

Question 31

Session layer

Answer 31

Layer 5 of the OSI model that handles all the sessions for a system. The session layer initiates sessions, accepts incoming sessions and opens/closes existing sessions

Question 32

Subnets

Answer 32

Largest networks broken up into smaller networks.

Question 33

Switch

Answer 33

A smarter device that replaced the hub

Question 34

TCP Segment

Answer 34

To see the transport layer in action, strip away the IP address from an IP packet. What’s left is a chunk of data in yet another container called the TCP SEGMENT

Question 35

TCP

Answer 35

Part of the TCP/IP Protocol.

Question 36

TCP/IP - Transmission Control Protocol/Internet Protocol Model including the link, Internet, transport and application layers

Answer 36

A model with 4 layers

Question 37

Transport Layer

Answer 37

Layer 4 of the OSI model that is the assembler/disassembler software.

Question 38

UDP datagram

Answer 38

A container that helps move data from the application layer.

Question 39

Unshielded Twisted Pair

Answer 39

A cable that usually contains four pairs of wires that can transmit and receive data

Question 40

User Datagram Protocol

Answer 40

A connectionless protocol